Feed-grinder.



PATENTED SEPT. 24, 1907.

`PATENTED SEPT. 24, 1907. s. K. .DENNIS & F. W. RICE.

FEED GRINDBR.

APPLICATION FILED TEE. 6, 1907'.l

2 SHEETS-SHEET 2.

invrrn n.

SITES ATEN'I OFFICE.

SAMUEL K. DENNIS AND FRANK WQ RICE, OF CHICAGO, ILLINOIS, ASSIGNORS TO INTERNATIONAL HARVESTER COMPANY,A CORPORATION OF NEW JERSEY.

FEED-GRINDER.

To all 'whom 'it may concern:

Beit known that we, SAMUEL K. DENNIS and FRANK W. RICE, citizens of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Feed- Grinders, of which the following is a complete specification. j

lThis invention relates to feed grinders, and more particularly to those of the cone and shell type.-

The object of the invention is to secure a more efficient feeding and initial breaking device; also feed regulating means, an emergency mechanism for separating the grinding cones in the event any destructive foreign substance is engaged thereby, and to effect further improvements in the details of construction of feed grinders.

Referring to the accompanying draWingsMFigure 1 represents a side elevation of a complete feed grinder embodying our improvements. Fig. 2 is a plan of the lefthand or grinding end of the machine. Fig.A 3 shows a central longitudinal section of the parts disclosed in Fig. 2, the view being taken on the line 3 3 of said figure. Fig. 4 is a perspective of the hopper bottom from the rear side as viewed in Fig. l, showing the hinged concave in connection therewith; and. Fig. 5 represents an inside elevation of the fixed cone support and feed slide in connection therewith, the Vview being taken as indicated by the line 5 5 in Fig. 3.

In the drawings the supporting frame is designated by the letter A, the hopper which is mounted thereon by B, and the hopper base by C. The hopper is secured to its base by means of the bolts b1, which engage said hopper and are received by the bolt holes c in the hopper base, and also the frame A.

The hopper base C is provided with the outwardly projectingshaftbearing bracket arms c, to which is xed the shaft-bearing bracket D, carrying the shaftbearing E. On the opposite end of the hopper base C is fixed the other shaftbearing F, and in these bearings E and F journals the shaft G, to the end of which is secured the driving pulley II and balance wheel II, On this shaft, within the hopper B, is fixed the cobbreaker and feed screw I, formed of a sleeve and the spirally disposed ribi thereon.

To the base-C of the hopper, and forming the bottom thereof, is hinged the concave J, which coperates with the'said cob-breaker and feed screw, This concave is provided with the two lugs j on one side (only one appearing in Fig. l), which have a permanent hinge connection with the corresponding lugs c2 on the hopper base C. The other side of the concave is breakably fastened to the lhopper base by means of the wooden pin o, or the equivalent thereof, which engages the 'Specification of Letters Patent. Application led February 6,1907. Serial No. 355,990.

in corresponding bolt holes in Patented sept. 24, 1907.

lugs c3 on the under side of the base Cand the lug j on the corresponding side of the concave J.

Located adjacent tothe lower sideof the hopper B is the conical shaped grinding chamber K, inclosed by the wall 7c, through which the shaft G extends and from which leads the discharge spout A fixed cone support L lies intermediate of the chamber K and hopper B, forming the Vwall therebetween, said support y being secured to the hopper 'base C by means of the bolts b, 'which' passtherethrough and engage corresponding apertures in the lugs 4 and in thedepending flange c5. The object in having the concave J breakably supported, as above described, is permit it to the shearing of the wooden pinwhenever a stone, a piece-of iron or other` foreign substance is inadvertently thrown into the hopper` and is engagedv by the feed screw and said concave, If the concave was xed rigidly instead of being breakably supported, either it or the feed screw, or some other part of the grinder would be obliged to yield and be broken by any hard substance which might be introduced with the material operated upon. The wooden pin is sufficiently strong to withstand the stress due to normal operation, but any unusual stress will vcause it to shear before any of the parts break. K

The fixed cone support L is formed with a central bore, which is preferablyV provided on its interior,

with' the longitudinally extending ribs'L (see Figs. 3

and 5), and terminating at its inner face in an enlarged opening surrounded by the flange l1. To this fixed cone support L is secured, by means of the screws m, the fixed cone M, and to the shaft G is fixed, by the pin n, the coperating movable cone N, both the fixed and movable cones being located in the grinding chamber K. Fixed to the shaft G, within the bore of the lcone support L and designed to coact with the ribs l therein, is a spirally disposed lauxiliary. feed screw I1,- said screw being arranged tofform in effect a continuation of the spiral rib i of the feed screwv I.

To regulate the feed of the material from the hopper to the cones in the grinding. chamber K, a ange l2 is made to extend over substantially half the bore of the support' L, the flange being recessed in the middle,I as clearly shown in Fig. 5, to provide space for the rota tion of the shaft G and the. auxiliary feed screw I1 thereon. with this flange l2 and regulate the'extent of the opening in the other half ofthe bore, the slide being adjusted by means ofthe yhand lever q, and is made toy immediately drop .to an inoperative position through ss i A movable slide Q is arranged .to coperate The outer end of this box has cut therein the slot t,

which straddles the support 'S and shoulders against `the ends of the 1:ibs s1. The inner end of the box has formed therein a bore which engages the outer end of the shalt G, the end thrust of said shaft being taken l5 up by the cage and balls L1, the steel washer t'l affording the bearing surface for the shaft. To permit the shaft G to rotate in the thrust box T, and to also compel it to move therewith in the longitudinal adjustment of the said box, an annular groove y is cut Ln the shaft adja- `cent to the inner end of the box, and an inwardly projecting arm u is iixed to the box T by means of the bolt nl, the end of. this arm engaging the said groove g. From the foregoing it will be seen that longitudinal adjustment oi the thrust box T willyproduce a corre- 2'5 sponding longitudinal movement oidhe shaft G and cone N.

The outer end ot the slotted portion of the box T is provided at the liop and bottom with the flanges t3, whichare engaged by the cam lever V. The body portion of the cam lever is ol' circular` outline, recessed as shown, to receive the hanged end of the box T, the flange ,o ol' t t cam being cut away lon both sides for a distance 'eqlhil'ilo the length ol the flanges tE on the box, so thatl when the handle o1 ol' the cam lever V extends hori B5 7.o tally the cuiaway portions of the flange o will register with the [langes t on the end of tho box T, permitting the said cam to 'be placed in position, and when the level' is turned to normal position the two parts will be locked together', the said cam lever form- 40 ing in el'lcct a cap lor the said box. The inner face of the cam levorV is provided with thel cam surface 'v, which coperates with the relatively iixed cam engaging edges s on the box support S, so that movement of the lever handle 'Ul to the left (to the loft when lacing the grinding chamber sido o l the machine.)y will cause the thrust box T, shalt G and dime N to be moved out- `Wardly. Threaded in that portion olthc thrust box support S which lies within the slotted portion of the thrust box T, and projecting outwardly therefrom',

through an aperture in tho body oi the cam lover V, is

the adjustment screw W. A shoulder yw is l'ormcd on this screw, against which the thrust box, through the cam leverV, is made to boar, and the outer end ol said screw is squared, as shown, and r'ecivcs the adjustment wheel. w1,- the nut w`- holding said wheelin position. Between the adjustment wheel w1 and the thrust box T a coil expansion spring Y is interposed, a washer y being placed between'tho `end ol' the spring and said box. This spring Y holds tho cam V against (i0 the shoulder w during the operation oi' the machine,` and hence its strength must be greater than the end thrust ou the shaft G arising from pressure between the grindinger cones N and M when in operation. With the adjustment screw W the cone N may be adjusted with Igpcct to its eoiopeiating cone to grind to any degree o1' "ing chamber located adjacent thereto, a shaft extending' `throughs-aid hopperan'd grinding chamber, a cob breaker iineness, the shoulder w forming an adjustableinner stop to limit the inward movement of the thrust box T as well as the shaftand cone N.l The portion' L4 in the box T constitutcsan adjustable outer stop which` limits the outward movement of .the cam members.

, The shoulder w on the adjustment screw,- by'limiting and it is to .be noted that in the operation of this emergency cam lever .V to move the cone N out and in the accurate adjustment of the working relation of the two cones is not disturbed,

In operation ii a 'wet cob or the like is engaged by the grinding cones, the movable cone N and shaft G will be forced outwardly against the pressure of the springY untilthe box partition t4 strikes against the box support S. This support S is rendered longitudinally adjustable by means of the nuts T on the rod R. There -is thus provided a longitudinally adjustable stop to limit both' the outward and inward movement of the thrust box T and the shaft and movable cone N inoperative connection therewith.

What we claim as our invention, and desire to secure by Letters Patent, is:

-1. In a feed grinder, in combination, -a feed hopper, a grinding chamber, a longitudinally adjustable shaft ex-` tending' throughsaid hopper and grindingchambeiza cone fixed in the grinding chamber, a cooperating cone fixed to the shaft, a thrust box support, means`oi' -'securlng the same to the grinder frame, a longitudinally sliding thrust box adjustably mounted on said supp'rt .engaging the' end of said shaft, a cam lever rotarively engaging the ond of the sliding thrust box and adapted to bear with its cam surface against the said thrust box support, a shoulf dercd adjustment screw projecting outwardly from the thrust box support-the shoulder thereof being arranged -to engage and-bear against the sliding box throw-ih the' said cam lever, and a spring reacting between the end of said adjustment screw and the cam level', thereby tend?A ing normally to hold the two cones in operative relation with respect to each other. c

2. ln a feed grinder, in combination, a feed'hopper, a grinding chamber, a longitudinally adjustable shaft extending through said hopper and grinding chamber, a cono iixed in th'e grinding `chamber, a cooperating cone fixed to the shaft, a longitudinally adjusvtahlssliding thrust box engaging the outer cnd of the shaft, wthrustbox support passim,y transversely through said box, the support constiluiingan adjustable stop 'to limit thoboutwllrd movement of the sliding box, threaded rods for adjuslably seturing,r said support to tht` grinder frame, an adjustment screw projecting; outwardly from said box support. a shoulder on said screw with which the box engages, said shoulder forming n stop to limit the inward movement of the sliding' box, and a spring' reacting between the outer end of the adjustment screw and said box.

IlA ln a fend grinder, in combination, a hopper, a grindund feed screw lixed thereto, said screw consistingr ol a v'sleeve having n sprally disposed rib formed thereon, a

fixed cone support located between the hopper and chamber, said support having a central bore which terminates at its inner face in au enlarged flanged opening andl which is provided on its interior with longitudinally ex-` tending ribs, a fixed cone secured to said support, a movable cone secured to said shaft, and eoperating with said fixed cone,and a spirally disposed auxiliary feed screw fixed to said shaft and arranged to coact with the ribs.

on the interior of the fixed cone support, said auxiliary feed screw being constructed and secured to the shaft independently of the said cob breaker and feed screw.

4. In a feedgrinder, in combination, a hopper, a grinding chamber located adjacent thereto, a shaft extending through said hopper and grinding chamber, a. fixed cone support located between the hopper and chamber' and forming the wall therebetween, thesad support having a central bore provided on its interior with longitudinally extending ribs and terminating on its inner face in au enlarged flanged opening, the flanged opening having formed therein a transversely, extending slot, a fixed cone secured to said support, a movable cone secured to said shaft and eoperatingfwith said fixed cone, a cob breaker and feed screw secured to said shaft and placed in the bottom of the hopper, a spirally disposed auxiliary feed screw constructed and fixed to said shaft independent ot' said cob breaker and feed screw and arranged to coact with the ribs on the interior of the rfixed cone support, an inwardly projecting flange formed in the mouth of the enlarged flanged opening of the central bore of said support, said flange covering substantially one-half of the mouth of said opening, and a movable slide adapted to fit in thetransversel'v extending slot formed in the flange of said opening, said flange and slide operating to close the passageway between the hopper and grinding chamber.

5. in a feed grinder, in combination, a feed hopper, a grinding chamber, a longitudinally adjustable shaft exltending through said hopper and grinding chamber, a cone fixed in the grinding chamber, a coperating movable cone fixed to theshaft, adjusting means normally stationary for`afleeting the longitudinal adjustment of said shaft and cone, the shaft andcone being longitudinally movable in a direction to separate the two cones independently ot said adjusting means, and a rotatable device normally stationary and olwrative independent of. 

